777942-86-6

Basic information

• Product Name: α-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate
• Synonyms: α-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate
• CAS NO: 777942-86-6
• Molecular Weight: 505.206
• Mol File: 777942-86-6.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: α-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate(CAS DataBase Reference)
• NIST Chemistry Reference: α-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate(777942-86-6)
• EPA Substance Registry System: α-cyano-3-phenoxybenzyl (1R,3R)-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate(777942-86-6)

Safety Data

• Hazardous Substances Data: 777942-86-6(Hazardous Substances Data)

Upstream product

• 53179-78-5 3-(2',2'-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylic acid 
• 56338-23-9 alpha-bromo-3-phenoxybenzeneacetonitrile 
• 488113-09-3 alphametrin 

Relevant articles and documents

Carboxamidoesters

Esters of formula: STR1 wherein R is either (a) or a group of formula: STR2 where X is methyl, chlorine or bromine, or (b) a group of formula: STR3 where Y is methyl or chlorine and n is one or two, and R2 is alkyl or 2 to 4 carbon atoms; and R1 is phenoxy or 2,2-dichlorovinyloxy.

Novel inversion process

A process for the preparation of an ester of chiral (A) acid with an optically active (S) α-cyano-3-phenoxybenzyl alcohol by reacting an ester of chiral (A) acid with α-cyano-3-phenoxybenzyl alcohol of the formula STR1 in its optically active (R) form or a racemic (R,S) mixture or a mixture of esters of said (R) alcohol and (S) alcohol in non-equimolecular proportions designated herein as ester (R+S) with a base selected from the group consisting of ammonium hydroxide, primary, secondary and tertiary amines, quaternary ammonium compounds, liquid amines of high molecular weight, ion exchange resins of a basic character and a catalytic amount of a strong base in at least one solvent in which the ester of the (R) alcohol is soluble and in which the ester of the (S) alcohol is insoluble and recovering from the resulting medium the chiral (A) acid ester of the (S) alcohol which is insoluble.

Preparation of phenoxybenzyl esters

Phenoxybenzyl esters are prepared by neutralizing an aqueous solution of a carboxylic acid and contacting the neutralized solution with a solution of phenoxybenzyl halide in a water-immiscible base in the presence of a phase transfer catalyst.